Lubricating device



DEC. 8, 1 936. H, R T 2,063,410

LUBRICATING DEVICE Original Filed 001;. 15, 1932 .INVENTOR HA E. Tea/2.

ATTORNEY Patented Dec. 8, 1936 PATENT OFFIC LUBRICA'I'ING DEVICE Harry B. Tear, Evanston, 111., assignor to The Lubrication Corporation, a corporation of Delaware Original application October 15, 1932, Serial No.

Divided and this application March 18, 1935, Serial No. 11,552

I 5 Claims. This invention relates to improvements in lubricating devices, and more particularly. to

lubricant guns and lubricant cartridges there- .for. -This application is a division of my copending application Serial No. 637,916 filed October 15, 1932.

An object of the invention is to provide a lubricant gun or dispenser, and cartridge therefor, wherein simple and effective means is employed for simultaneously securing the cartridge to the gun and for establishing a fluid tight seal therebetween.

A further object is to provide gun cartridge mounting -means effective to provide a lubricant tight seal between the cartridge and the gun of a character wherein forces tending to move the cartridge out of normal position relative to the gun maynot destroy the seal therebetween. This feature is of particular importance in such cases as where no protective housing is employed to surround the cartridge. Other objects, the advantages and uses of the invention, will be apparent after reading the following description and claims and after consideration of the accompanying drawing forming a part of this specification, in which:

Fig. l is an elevation, partly in section, of 'a hand lubricant gun andcartridge aflixed thereto constructed in accordance with the invention; an

Fig. 2 is a fragmentary sectional view of the cartridge structure with its closure cap in place.

In general the device selected for illustration herein comprises a lubricant gun of the hand operated type having a pressure cylinder A within which a pistonB is mounted for manual operation, a cartridge connector stud assembly for supporting the lubricant cartridge D upon the gun, for establishing communication between the cartridge and pressure cylinder A, and for simultaneously providing a lubricant tight seal therebetween, a closure cap E for the cartridge for use in sealing the cartridge when not in place upon the gun, and a piston follower F within the cartridge adapted to move under atmospheric pressure to follow the lubricant as {it is withdrawn therefrom into the pressure The cartridge connector stud assem (Cl. 2214'l.3)

bly C includes a connector stud 5 having a passageway 6 therethrough, a check valve 1 in the passageway and an externally threaded shank 8 for reception and support within an internallythreaded bore through the side wall of the cylinder A. vThe connector stud 5 is further formed with a hexagonal flange 9, for turning the stud in place within the threaded bore of the cylinder wall, and a slightly tapered external wall portion Ill below the flange 9. A screw threaded socket ll encompassing the stud serves as a. means for drawing the cartridge into engagement with the stud as hereafter described.

The cartridge D is preferably cylindrical in form, having one end closed by an end plate 15 through which the outlet I3 is provided. The end plate may be secured to the side walls It of the cartridge by a seam I'I so as to become a permanent part of the cartridge. The lower end of the side walls I6 may be rolled inwardly as shown at It for the purpose of reinforcement and for retaining the follower F against removal from within the cartridge. The central portion I! of the end plate l5 presents an outwardly extending conical wall.

The contour of the follower piston F is such as to closely follow that of the inner wall of the end plate I5, an arrangement which assures the removal of all of the cartridge contents.

The head l5 of the cartridge D is formed with a centrally projecting portion 2| formed with screwthreads upon the side wall thereof which are engageable with the threaded socket llfforming a part, of the cartridge stud assembly. The socket It may be fixed between the flanged portion 9 of the stud C and the adjacent wall of the gun cylinder A as shown in Fig. 1. A lubricant tight seal between the cartridge outlet opening and the stud 5 is established through the medium of the slight taper formed on the side wall of the stud as shown at Ill, which provides a wedging action between the stud and a similarly tapered side wall 22 of the opening I3 when the threaded portion 2| of the cartridge is screwed into the socket II The side wall 22 of the outlet opening I 3 is located centrally of the threaded portion 2| of the cartridge. The closure E is provided with a tapered side wall as shown in Fig. 2

- seal the outlet opening l3 of the cartridge, the

follower piston F serving as a lower end wall of the cartridge. the gun, the operator may remove the closure E and screw the cartridge in place within the socket H until the surface ID of the stud engages tightly with the wall 22 of the cartridge outlet thereby through wedging action to provide a lubricant tight seal therebetween. The seal thus formed may not be impaired by jar or impact applied to the cartridge or by forces tending to cause relative angular movement therebetween as the head structure I of the cartridge affords relatively high flexibility.

It is to be understood that the described embodiments of the invention herein set forth are presented for the purpose of illustration only and various changes may be made therein without departing from the spirit and scope of the invention.

I claim:

1. In combination, a lubricant feeding device having a cartridge connector assembly including a tubular, stud and a threaded socket rigidly connected to and concentric with said stud, and a lubricant cartridge having an end wall formed with a threaded extension for reception in said socket and having a lubricant outlet opening centrally located in said extension, the walls of which are adapted to closely receive and to form a lubricant tight seal with said stud when said cartridge is screwed into said socket.

'2. In combination, a'lubricant feeding device having a cartridge connector assembly including a tubular stud and a threaded socket rigidly connected to and concentric with said stud, and a lubricant cartridge having an end wall formed with a threaded extension for reception in said socket and having a lubricant outlet opening centrally located in said extension, the walls of which are adapted to closely receive and to To install the cartridge upon 1 form a lubricant tight seal with said stud when said cartridge is screwed into said socket, said stud and said lubricant outlet wall being tapered to provide tight engagement with one another by a wedging action.

3. In combination, a lubricant feeding device having a cartridge connector assembly including a tubular stud and a threaded socket rigidly connected to and concentric with said stud, and' a lubricant cartridge having a thin sheet-metal threaded extension for reception in said socket, said extension terminating in a flat relatively flexible end wall formed with a centrally located outlet orifice, the walls of which are adapted for sealing engagement with said stud when the extension is screwed into the socket.

4. In combination, a lubricant feeding device having a cartridge connector assembly comprising a tubular stud and a socket rigidly connected to and concentric with and at least as long axially as said stud, and a cartridge having an extension adapted to be secured in said socket, the walls of said'extension being turned inwardly at one end and adapted for sealing engagement with said stud when the extension is secured in the socket. v

5. In combination, a lubricant feeding device having a cartridge connector assembly comprising a tubular stud and a socket rigidly secured to and concentric with said stud, and a cartridge having an extension formed with a centrally located outlet opening, the walls of which are adapted for sealing engagementwith the stud, and cooperating means on the socket and the extension for securing the extension in the socket and pressing the walls of the outlet opening into sealing engagement with the stud when the cartridge is rotated relatively to the socket and the stud.

HARRY R. TEAR. 

